I generally agree with him, although there are exceptions. You can't generally replace the functionality that centralized servers provide without some sort of m

I generally agree with him, although there are exceptions. You can't generally replace the functionality that centralized servers provide without some sort of mechanic to compensate and incentivize the decentralized nodes themselves. If you relied on VISA or Paypal and charged a fee for the service in that sense, well you now have to stand up an organization that gets to straddle the network and effectively control it. And now that organization has a legal surface area, as well as an administrative surface area that is attackable and can compromise the network itself.